linux-kernel - Re: [PATCH v3 4/7] sched: make the output of schedstats independent of fair sched class

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Message-ID: <YS4Nu6LJwwxfcTr1@hirez.programming.kicks-ass.net>
Date:   Tue, 31 Aug 2021 13:08:43 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Yafang Shao <laoar.shao@...il.com>
Cc:     mingo@...hat.com, mgorman@...e.de, juri.lelli@...hat.com,
        vincent.guittot@...aro.org, dietmar.eggemann@....com,
        rostedt@...dmis.org, bsegall@...gle.com, bristot@...hat.com,
        achaiken@...ora.tech, lkp@...el.com, linux-kernel@...r.kernel.org,
        linux-rt-users@...r.kernel.org
Subject: Re: [PATCH v3 4/7] sched: make the output of schedstats independent
 of fair sched class

On Tue, Aug 24, 2021 at 11:29:43AM +0000, Yafang Shao wrote:
> The per cpu stats can be show with /proc/sched_debug, which includes the
> per cpu schedstats of each task group. Currently these per cpu
> schedstats only show for the fair sched class. If we want to support
> other sched classes, we have to make these output independent of fair
> sched class.

Arguably the whole rt group stuff needs to die, please don't enable it
further.